Investigation of the protective effect of an environmentally safe composition of sodium alginate and zinc acetate on the mechanically activated surface of aluminum alloy

Keywords

corrosion, aluminum alloy, sodium alginate, zinc acetate, repassivation, mechanical activation.

Cite as

Khlopyk O. P., Sobodosh N. Y., Starik S. P., and Zin І. М. Investigation of the protective effect of an environmentally safe composition of sodium alginate and zinc acetate on the mechanically activated surface of aluminum alloy. Physicochemical Mechanics of Materials. 2025. 61(5), 072-080.

https://doi.org/10.15407/pcmm2025.05.072

Abstract

The protective efficiency of an environmentally safe composition based on sodium alginate and zinc acetate was investigated during the repassivation stage of the mechanically activated surface of D16T aluminum alloy. It was established that the use of the composition in a 0.1% NaCl solution promoted restoration of the electrode potential and reduced the corrosion current density of the alloy within the first minute by a factor of 2 compared to the uninhibited solution. Micro-X-ray spectral analysis and FTIR spectro­scopy confirmed the formation of a protective film containing alginate complexes with Al³⁺ and Zn²⁺ cations.The obtained results indicate the prespective use of this composition for protecting aluminum alloy structures operating under conditions of corrosion-mechanical loading.

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